搜索 - 科创网

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内容：以脉宽调制芯片tl494为信号源驱动此电路，multisim仿真中mosfetgs驱动波形如下：可以看到最高信号电平稳定在12v左右，完美解决了电位问题。,总体来看，效果是不错的，最高信号电平稳定稳定自举二极管和自举电容都发挥了作用，其中上升沿较长后来发现是栅极电阻取值过大，后来将其换位十欧姆电阻后有较大改善而下降沿并无仿真中的问题，怀疑是这个tl494模型的准确性有问题,如果以一个固定占空比的信号源驱动这两种拓扑，整个电路将处于开环工作状态，输出电压随着mosfet和肖特基二极管的温升和负载的变化而波动，为了在这三者改变的同时保持输出电压的稳定pwm驱动芯片分为电压型（,仿真波形如下：可以看到，最终输出电压稳定在基准电压五伏附近。

内容：灰色部分），除型材及配件，紫铜材料，固定管外，其他部分均为3d打印（自有打印机一台）子弹为6*70mm钨钢尖划针总长1340mm（可能会变动），之所以管和子弹都这么长是为了在没有膛线的情况下增加子弹稳定性

内容：XPM2 1030以其热稳定性、连贯性，能在7天24小时不间断的提供稳定的加热，在大规模连续生产中，其生产效率得到完美的体现。,综上所述，小型台式回流焊机的性能足以满足各种SMA的回流焊接要求，虽然在热稳定性，热均匀性以及大规模生产效率上不如大型多温区回流焊机，但是在多品种、小批量生产，科研教学等方面，小型台式回流焊机的灵活方便

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